Economizing-throttle for internal-combustion engines.



A. G. SI'EWAR'L'.

ECONOMIZING THROTTLE E OF. INTERNAB COMBUSTION ENGINES. APPLICATION TILED JUNE 33, 1910.

9133,6541 Patented Feb. 7, 1911.

'eonditioin and ALFRED (J. STEXVART,

OF LOS ANGELES, CALIFORNIA.

ECONOIILIZING- THROT'ILE FOR INTERNAL-COMBUSTICN ENGINES.

Application filed June 523, 1910.

To all whom it may concern:

Be it known that l Amman (l. fi'inwxu'r, a eit-izen ot' the United Qtatea. residing at lioa Angeles. in the eounly o't lax? Angeles and State ot talil'ornia. have invented a new and useful lCeonomizi1ig-Throttle for internal-Combustion Engines. of whieh the l'ollowing la a speeifieation.

The main object of the present inrention is to provide meana l'or admitting auxiliary air supply to the mixture in an internal eon'ihustion engine in sueh manner as to provide for maximum eeonomy.

The invention ia partieularly intended to provide for eeonomizmf g in nee o'l l'uel lay means operating in eonneetion with the throttle in our-h manner that when the engine has heen ln'ought up to a given speed. with the throttle to a more or lee-1 wide open the throttle is then moved back part way to closed poeition, auxiliary air will he admitted so as to dilute the mix ture and eeonomize in use of the"tuel.

The in vention in particularly intended for applieation to automobiles. in running an automobile it usual in speeding up the maehine to open the throttle wide until the desired speed ha heen reaeheih and it at any time it if desired to ease up the speed, for example, when ohstruetions, crossings, or

turns are to he pur ed, or a slight down grade is reaeheth the throttle will he moved haelc part. way toward closed position. in ortlerto give high starting and pulling eapaeity it is usual to provide the engine with an explosive mixture whieh is eorreaponit ingly rieher than that requisite 'l'or maximum eeonomy ol luel. and when the throttle moved hael; in the mama.) above tleserihed, the ellieieney olf operation tends to renniin substantially the same as with the throttle wide open, the quality of the mixture being the same, but lea being taken in at eaeh Stroke. By providing for admission of au.\' iliary air supply at aueh time, the mixture is rendered more eeonomieal and the ellieieney of the engine under sueh eireumstances is ein'respondiugly inereased. hlloreover, the adrniaaion ol auxiliary air supply increases the volume of charge admitted thereby inereasing the initial pressure whieh has a further e'tleet on the inereazee ol ellieieney.

Other oh'jeeta ol the invention will appear hereinafter.

Specification of Letters Patent.

il'atented Feb. '7, 1911. Serial No. ass/m.

'lhe aeeompanving drawings illustrate the invention, and referring; thereto:

l'ieau'el is a side elevation of the throttle. Fig. '1 ie' a horimntal seetion through the throttle ehamher. Fig. i) is a tranaverse neetion on the line of we in Fig. 3. Fig. l i 1 a side elevation showing a moditied form of the invention. 7

l deaie'natea the throttle ehamher provided with the usual means 2 'lor attaehment to a cylinder or manifold of an internal eomhuation engine and with the usual means 13 for athn-hna-nt to a earhureter or means lor supply ot lXIlltltilYtl mixture. The

throttle valve *l mounted in said throttle ehaniher is earriwl by a hollow Slt'lll 5 having a slot t3 lamnnunieating with the interior ol the throttle elnunher, prel'erahly on the side toward the engine. lixteriorly oi the throttle ehamher there in mounted on the throttle valve stem an operating arm T eon- .neeted to the usual eontrollim;- or operating means through a rod or other suitable device indil'rat'ed at h. Said operating arm T is loosely mounted on the stem 4' so as to he :apahle ol" relative rmation thereon and is eonnerted thereto through internnaliate deviees. hereiimlter dersrrihedfi The stem 5 also earriee exteriorly ol' the throttle ehamher an arm or roeking memller 1t) fastened to stem. 5 hy pin or other means 'l-l. .\n adjustable arm ll. is elamped. for example, by elamp means 12, on a tixed sleeve Fl on the throttle ehamher. ltorhing memher it! is provided with a projeetion til l'or engaging the open ailing arm 7, and arm ll iL-l prov ded with a lug or projeetion l 'l noting; as a stop tor the memher it). Memher to i:-; further provided with a segment rank 1? engaged hy a detent l8 whieh may he formed av ment pivoted on an. arm ll which is pivot ally mounted on the lived member or arm 11, a. spring ll being eonneeted to the arm 11. and delent [H to draw the detent 18 into engagement with the segment raeh l7. Operalinganemher T lo provided with a n'ojeetion or roller 3t adapted to engage the arm ll) to release the detent it? from the segment 'aelt, as hereinal'ter explained. spring;- eonneeted to the memhers ll) and 'l t tends to hold or move aaid memher ltl in a direction to bring a part it) thereon into position against the stop ltl.

Valve stem. 5 is elosed at eaeh end and, in addition to the srlot (3 is pro ltlt l with a a toothed sure.

port Q4 which cooperates with a port or opening in the hub 26 on the arm 7, said ports 2% and 25 being normally out of register, but being moved into register under certain conditions, as hereinafter described.

T 1e operation of this form of the invention is as follows: The normal or inoperative position of the ports is shown in dotted lines in Fig. 1, the rocking member 10 being held over by the spring so that the stop por tion 10 thereon is in contact with the stop 16 on the fixed member 11. At this time the controlling arm '7 may be in contact with the stop 15 on arm 10. The throttle to come in contact with the segmentaack 17' on the rocking member 10, said detent slip ping over the teeth of the segment rack 17 in the rocking movement of the member 10, as above described, so as not to interfere with said movement. This operation of arm 7 opens the throttle, but as the rocking member 10 moves with the arm 7 no change takes place in the relative positions of the ports and '25, so that the auxiliary air supply conm'uinication remains closed. It

now the arm '4 be moved. back somewhat, so as to. check the speed of the machine, by partially closing the throttle, the spring 22 tends to pull the arm 10 back to its normal position shown in dotted lines in Fig. 1, but this motion is prevented by the detent 18, so that said arm is maintained in the position shown in full lines in Fig. 1. Consequently, the back movement of the handle 7 is accompanied by a relative movement of the members 26 and 5 causing the port 25 to open connmmication from the outer air through the port- Qi to the interior of the valve stem and through the opening (3 with the interior of the throttle chamber, preferably on the side toward the engine, that auxiliary air is admitted to the mixture passing to the engine and as the handle is moved back farther to increase the throttling effect, the auxiliary air communication is opened wider by registering oi the ports 24 and 25, so as toincrease theauxiliary air admission. By such admission of auxiliary air under the conditions stated, the economy or elliciency ol operation of the engine is increased, as above stated.

l Vhen it necessary to stop the machine, it is requisite that the auxiliary air supply established as above described should be cut elf and this is e'll'eetedby the projection 01' rollfil on the arm or operating member i which, when the arm is moved clear back to normal position, as shown in dotted lines in Fig. 1, engages the arm 19 throwing it up to position shown in dotted lines, thereby releasing the detent v1S from the segment rack 17 and allowing the spring to draw the rocking member 10 back to normal position shown in dotted lines. in which the ports 2st and 25 are out of register.

The invention is not limited to the construction shown wherein the throttle valve itself is used as a means for admission of the auxiliary air supply, but, as shown in Fig. 4, may be applied in connection with an auxiliary hollow shaft sleeve 28 mounted. to turn in a chamber 29 connected to the throttle chamber 1, the throttle arm 7 in this case being connected by a linlt 30 to a lever 31 having an arm provided with a projection alt Anothe" arm 3% mounted in fixed position is provided with a stop for the arm 32 and said arm 32 is provided with a projection lo for engaging with an operating arm 38 connected, by means 49, so as to be operated or controlled for throttling the engine, said arm 38 having a sleeve l0 provided with a port all cooperating with a port- -l-2 in the sleeve 28 communicating with the interior of the chamber 29. Fixed arm 3st is further provided with a pawl lat engaging a segment rack 4-8 on rocking arm and'having a tail portion adapted to be engaged by a roller or projection 4'? on the operating arm 38. The operation of this form of the invention is the same as that above described, except that the admission of air is through the separate hollow sleeve 28 instead of through the stem of the throttle valve.

What I claim is:

1. In combination with the throttle of an internal combustion engine, and the controlling means therefor, auxiliary air supply means, and an operating connection between said air supply means and said throttle controlling means to open the auxiliary air supply in back movement of the said throttle controlling means for partially closing'the throttle.

In combination with the throttle otan internal combustion engine, and the controls ling means therefor, auxiliary air supply means, an operating connection between said air supply means and said throttle controlling means to open the auxiliary air supply in back movement of the said throttle controlling means for partially closing the throttle, and means for closing the auxiliary air supply when the throttle is moved to closed position.

In combination with the throttle valve and throttle chamber of an internal combustion engine, an operating member connected to operate the throttle valve and having an auxiliary air supply port, a rocking member having a passage communicating with said throttle chamber and having a port communicating with said passage and adapted to move into and out of communication with the port in the operating member, said rocking member being provided with means for engagement with said operating men'iber, whereby operation of the operating member in closing the throttle will rock the rocking member, means for restoringsaid rocking member to normal position, and means for arresting the restoring movement of said rocking member in the back movement of the operating member to allow admission of air through the aforesaid ports.

'4. The combination of a throttle chamber, a throttle valve therein, a stem for said valve having a port and a passage communicating with said chamber and with said port. a rocking member on said stem and moving with the stem and provided with a projection, a controlling arm mounted to move on said stem, and to engage said projection for opening the throttle, a fixed member having a stop for the rocking member, a Spring for moving said rocking member toward said stop to close the throttle, a detent mounted on said fixed member and engaging the rocking member to hold it from closing movement under the action o't said spring, auxiliary air supply means operated by said controlling arm to establish air eou'imuuication with the aforesaid port on relative movement oi the rocking member and throttle, and means on the controlling arm engaging the detent to release the same from the rocking member.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this l tth day of June, 1910.

ALFRED C. STITEVARIY.

In presence ot'-- ARTHUR 1. KNIGHT,- FRANK L. A. GRAHAM. 

